Weaverville, CA – Residents across Trinity County should prepare for a sharp drop in overnight temperatures as a Frost Advisory goes into effect tonight, bringing the risk of damage to outdoor plants and early-morning frost across much of the region.
According to the National Weather Service (NWS) Eureka office, the advisory begins at 9 p.m. Monday and extends through 9 a.m. Tuesday, covering communities including Trinity Center, Hayfork, Weaverville, Douglas City, Forest Glen, Peanut, and Ruth. Forecasters say temperatures may fall to around 33 degrees, cold enough for widespread frost formation by early morning.
The NWS warns that the conditions could be particularly hazardous for residents with gardens, fruit trees, or sensitive outdoor vegetation. Frost can damage or kill unprotected plants, especially during the late fall transition when Northern California typically sees its first round of seasonal cold snaps. Officials advise residents to cover plants, bring potted vegetation indoors if possible, and consider protecting outdoor plumbing in more exposed rural areas.
The advisory arrives as portions of Northern California experience clearing skies and calm winds—ideal conditions for radiational cooling overnight. Forecasters say rural valleys and shaded areas are most likely to see the coldest temperatures before sunrise Tuesday.
Drivers in the region may also encounter slick spots on bridges, shaded roadways, and higher-elevation routes during the early morning commute. Although no widespread travel hazards are expected, the combination of frost and near-freezing temperatures may require extra caution in the coldest pockets of Trinity County.
The NWS will continue monitoring overnight conditions and encourages residents to check updated forecasts, especially those living in frost-prone valleys or planning early-morning travel.
